Lennox MERIT Series Installation Instructions Manual page 9

Allow for clearances to combustible materials as indicated
on the unit nameplate. Minimum clearances for closet or
alcove installations are shown in FIGURE 13.
WARNING
Blower access panel must be securely in place when
blower and burners are operating. Gas fumes, which
could contain carbon monoxide, can be drawn into living
space resulting in personal injury or death.
Back
NOTE - Do not install the furnace on its front, back or in the horizontal position
FIGURE 12
SETTING EQUIPMENT
AIR FLOW
FRONT VIEW
Unit must be level side-to-side. Unit may be positioned
from level to 1/2" toward the front to aid in draining.
Front
Page 9
AIR FLOW
AIR FLOW
SIDE VIEW
SIDE VIEW
FIGURE 11
Horizontal
1/2"
max.